Pet door



FIG. 1 shows a perspective view of the pet door.

FIG. 2 shows a front elevation view of the pet door.

FIG. 3 shows a rear elevation view of the pet door.

FIG. 4 shows a right side elevation view of the pet door.

FIG. 5 shows a left side elevation view of the pet door.

FIG. 6 shows a top plan view of the pet door; and,

FIG. 7 shows a bottom plan view of the pet door.

The shade lines in the Figures show contour and not surface ornamentation.

The broken lines shown in the Figures show portions of the pet door which form no part of the claimed design. 

CLAIM The ornamental design for a pet door, as shown and described. 